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An Overview of Arsenic Removal Technologies in Bangladesh and India

In the context of prevalence of high concentrations of arsenic in tubewell water,a wide range technologies has been tried for the removal of arsenic fromdrinking water. The most common technologies utilized the conventionalprocesses of oxidation, co-precipitation and adsorption onto coagulated flocs,adsorption onto sorptive media, ion exchange and membrane techniques forarsenic removal.

 

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Bagging Industrial Drains:A Solid Media Survey of Stormwater Contamination

Conventional approaches to stormwater quality evaluation combine continuous flow rate monitoring and automated sample collection for chemical analysis to derive an event mean concentration for each pollutant of concern. This approach requires expensive flow monitoring and automated sample collection equipment and the costly analysis of high numbers of water samples.

 

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Bangladesh – from a country of flood to a country of water scarcity – sustainable perspectives for solution

Quite often Bangladesh is portrayed as a water abundant country, which does not give the full picture of her water problems. Due to the temporal distribution of water resources, water problems of Bangladesh fall within two extremes. At one extreme is the monsoon period between June to October when the country becomes flooded due to high flows in the transboundary rivers and heavy rainfall within the country. At the other extreme is the dry season between December to May when the country become severely water stressed due to low water availability, unsustainable upstream water withdrawal and low quality of groundwater.

 

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BEST PRACTICE FOR MODELLING SUSTAINABLE URBAN DRAINAGE SYSTEM STRUCTURES

Sustainable Urban Drainage Systems (SUDS) design has traditionally been simplistic, using basic equations and “rules of thumb” often leading to conservative designs. Now with plenty of information available advising planners about the different types of SUDS structures available it is often left to engineers to build or develop hydraulic models to quantify how these structures will operate for a range of operating conditions.

 

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Identifying Social Attitudes and Barriers to Water Conservation – A Community Water Survey

In 2003, Eurobodalla Shire Council adopted its Integrated Water Cycle Management Strategy (IWCMS), which suggested that appropriate levels of Demand Management could be achieved through targeted customer rebate and community education programs. Whilst various education and incentive programs targeting water conservation had been previously run, it was felt they lacked a “documented” strategic approach, adequate monitoring and evaluation and any detailed knowledge of local people’s attitudes to and the level of uptake in the Community of various water saving devices.

 

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Comparative assessment of four alternative water supply options in arsenic affected areas of Bangladesh

Arsenic contamination in groundwater and its toxic effect on human health is a major public health problem in Bangladesh and it is emphasized in the national level to use alternative water sources for drinking water to mitigate the arsenic problem. To identify reasons of nonfunctioning and in order to develop a comparative information and better understanding of the options, assessment of alternative water supply options in both technical and social aspects are essential. The study was conducted on 11 Dug wells (DW) of Charghat, Dohar and Gazaria, 9Deep hand tubewells (DTW) of Dohar and Gournadi, 17 Rain water harvesting systems (RWHS) of Charghat, Gournadi, Pathorghata and Ghior and 6 Pond sand filters (PSF) of Pathorghata and Gournadi.

 

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Experiences with the management and implementation of drinking water supplies in Bangladesh

In previous articles we expressed the view that the arsenic problem in Bangladesh is not primarily a technological problem (Rammelt & Boes 2004, 2006). The main issue seems to be that the appropriate organisational structure needed to successfully implement any of the existing options is almost non-existent in rural areas. Based on this observation a programme has been initiated with the objective to build the needed institutions at a village level with support from research organisations and local NGO’s as important participants in the implementation process.

 

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Cooperate or coerce? Intergovernmental approaches to mainstreaming Water Sensitive Urban Design

Water Sensitive Urban Design (WSUD) is still largely in its infancy, and many governments, organisations, and communities are still reinforcing the traditional urban water management approach of highly engineered, mutually exclusive water supply, wastewater, and drainage systems. Many agree that institutionalising WSUD to establish widespread practice can only be achieved through a cooperative partnership approach that includes state and local governments. However, there is no consolidated assessment of the necessary ingredients and key factors that produce successful intergovernmental arrangements for WSUD.

 

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Impact of arsenic contamination in groundwater on poverty and choice of mitigation technology for rural communities in Bangladesh

Discovery of the presence of arsenic in the drinking water in Bangladesh has been a cause of red alert in the public health arena. ith a per capita income of US$482 (2006), dealing with this crisis is a major challenge for the government of Bangladesh, donor communities and the NGOs working in Bangladesh. However, heterogeneity of the people in terms of their choices for mitigation measures, income/wealth, information, health, poverty, social status and religion,  often makes it difficult to find an efficient solution.

 

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INTEGRAL WATER MANAGEMENT, ORIENTED TO THE RENOVATION AND URBAN - ARCHITECTONIC SUSTAINABLE PLANNING,OF THE EL PALOMAR DEVELOPMENT

The present work describes of general way to the Project of Integral Water Management, Oriented to he Renovation And Urban - Architectonic Sustainable Planning, of the El Palomar Development at Municipality of Tlajomulco de Zúñiga, Jalisco, Mexico. “El Palomar Development” is an area of high economic level in the Metropolitan Zone of Guadalajara and belongs to “La Primavera” Forest and it is at the upstream of the “El Ahogado” basin which is a sub-basin of the Lerma-Santiago River. This last basin is the most important in western of México.

 

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